FNUS75 KRIW 190404
FWSRIW

SPOT FORECAST FOR NORTH FORK...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
1004 PM MDT WED AUG 18 2010

FORECAST IS BASED ON REQUEST TIME OF 2047 MDT ON AUGUST 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LEVEL TROUGH AND ASSOCIATED COLD FRONT WILL MOVE
ACROSS WYOMING THURSDAY...BRINGING A CHANCE OF THUNDERSTORMS
CENTERED AROUND THE NOON HOUR ALONG WITH COOLER TEMPERATURES AND
LOWER RELATIVE HUMIDITY. A DRIER MORE STABLE AIRMASS WILL QUICKLY
BUILD IN THURSDAY EVENING WITH WARMER AND DRIER CONDITIONS
EXPECTED FRIDAY. CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST OVER
THE UPCOMING WEEKEND...WINDY...WARM WITH VERY LOW RELATIVE
HUMIDITY.


...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...MEUNIER

.THURSDAY...
SKY/WEATHER.........INCREASING CLOUDS THROUGH THE MORNING (TO 40-50 PERCENT) WITH
                    SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING PRIMARILY
                    BETWEEN 1100 AND 1400 WITH A COLD FRONT PASSAGE.
MAX TEMPERATURE.....70 TO 74.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........WEST SOUTHWEST 5 TO 10 MPH IN THE MORNING...INCREASING TO
                    10 TO 15 MPH WITH GUSTS TO 25 MPH AROUND 1400.  GUSTY
                    ERRATIC WINDS LIKELY WITH THUNDERSTORMS PRIMARILY FROM
                    1100 TO 1400.
RIDGE TOP WINDS.....WEST SOUTHWEST 10 TO 15 MPH IN THE MORNING...INCREASING TO
                    15 TO 20 MPH WITH GUSTS NEAR 30 MPH AROUND 1400.
LAL.................4.
CWR.................6 PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...MOSTLY CLEAR. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 40S. WEST WINDS
AROUND 17 MPH.
.FRIDAY...MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
IN THE UPPER 40S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS AROUND
14 MPH.
.SATURDAY...PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. SLIGHT CHANCE OF SHOWERS. SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE MID 70S.
SOUTHWEST WINDS AROUND 12 MPH.
.SUNDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS
AROUND 16 MPH.
.MONDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S. SOUTHWEST WINDS
AROUND 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...LELAND BLACK
REASON FOR REQUEST...WILDFIRE
.TAG 20100818.NORTH.01/RIW